The Freudenberg-NOK SIMRIZ SZ484 O-Ring, designated AS568-348, has an inner diameter of 4-3/8" and an outer diameter of 4-3/4". Made from high-performance SIMRIZ material, this O-Ring is engineered for exceptional resistance to high temperatures and aggressive chemicals, making it ideal for use in harsh environments. It is suitable for various applications, including hydraulic and pneumatic systems, ensuring reliable sealing and preventing leaks. The precise dimensions guarantee a secure fit, enhancing equipment performance.